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Re: vibration update on the cuda
[Re: 493_Scamp]
#126945
09/28/08 06:50 PM
09/28/08 06:50 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
I would run it without a shaft.Make a dummy plug out of an old yoke and a plate to keep it from backing out. Run the car at the rpm it vibrates and shift 2-3 a couple times.Remember not to hit park,just shut it off. What happened to the original front drum? Did the bushings and washers look ok? Hows the end play?
thats actaully a good idea there, the front drum was in bad shape and couldnt be reused, end play is all good
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Re: vibration update on the cuda
[Re: cudadan]
#126946
09/28/08 07:19 PM
09/28/08 07:19 PM
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Joined: Feb 2003
Posts: 885
south louisiana
lowell66dart
super stock
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super stock
Joined: Feb 2003
Posts: 885
south louisiana
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If you do pull the tranny bolt the converter back up and check the runout with a dial indicator. I have a B&M flexplate on my 340 that I had to modify to work. Won't buy another one.
2021 Dodge 2500 4WD Cummins
2020 Challenger R/T Scat Widebody
2007 Charger R/T 5.7
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Re: vibration update on the cuda
[Re: lowell66dart]
#126947
09/28/08 08:35 PM
09/28/08 08:35 PM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Just my  as every body else has a cure to your problem. You say that you get two runs before the rear joint goes bad? I would think if it was in the trans the front joint would go. I would look at the rear pinion angle , the rear housing is probably sticking straight up. U-joints can take alot of vibes before they wear out. Also look at the rear yoke to see if it's spread out , if it is, it won't center and cause a vibe and even kick out the joint.  
it's ok to butt heads, just don't do it with a butthead
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Re: vibration update on the cuda
[Re: lowell66dart]
#126948
09/28/08 08:41 PM
09/28/08 08:41 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
If you do pull the tranny bolt the converter back up and check the runout with a dial indicator. I have a B&M flexplate on my 340 that I had to modify to work. Won't buy another one.
but the flex plate was workn before with no issue could it just go bad?
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Re: vibration update on the cuda
[Re: rowin4]
#126949
09/28/08 08:44 PM
09/28/08 08:44 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
Just my as every body else has a cure to your problem. You say that you get two runs before the rear joint goes bad? I would think if it was in the trans the front joint would go. I would look at the rear pinion angle , the rear housing is probably sticking straight up. U-joints can take alot of vibes before they wear out. Also look at the rear yoke to see if it's spread out , if it is, it won't center and cause a vibe and even kick out the joint.
but the angle was good before this problem started ive changed the angle up abd down a few degree's all still with the same results
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Re: vibration update on the cuda
[Re: rowin4]
#126951
09/28/08 10:12 PM
09/28/08 10:12 PM
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Joined: Mar 2003
Posts: 1,728
ST clair shores MI
moretoys
top fuel
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top fuel
Joined: Mar 2003
Posts: 1,728
ST clair shores MI
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Stock trans mount/height??solid/poly mount?? Maybe the rear axle housing bent.any problems sliding the axles in/out?? Posible bent spring/making thrust angle off.rear wheels pointing more 1 way then the other.(dog tracking) Do you buzz the engine to the same rpm in 1st and 2nd?? Switching to 3.23 gears made the vibration come at a higher mph,Then It has to be rpm related A shot in the dark.the fan??? A cracked flywheel will usually make some noises tailshaft bushings ok?? Vibrations can travel.What if the vibration is up front of the shaft,but the rear u-joints go bad because there is no room to move/ more tightly held together. Have you had it on jackstand,and whatched the driveshaft,should be pretty smooth,any osilation. just thinking outloud. 
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Re: vibration update on the cuda
[Re: cudadan]
#126952
09/28/08 10:16 PM
09/28/08 10:16 PM
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Joined: Jan 2003
Posts: 75,319
A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,319
A gulag near you.
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Quote:
Quote:
If you do pull the tranny bolt the converter back up and check the runout with a dial indicator. I have a B&M flexplate on my 340 that I had to modify to work. Won't buy another one.
but the flex plate was workn before with no issue could it just go bad?
If the flexplate was in before this and was ok it would still be fine, there are no extra weights on it unless you put some extra holes in it for some strange reason.
what happened to the front drum ?
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Re: vibration update on the cuda
[Re: JohnRR]
#126953
09/29/08 11:32 AM
09/29/08 11:32 AM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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How are you sintalling teh u joints? Are you seating them against the clips after installing the clips? It's driveshaft. Definately. If you moved it up and fdowna couple degrees (pinion angle) what is is currently set at? You are positive you're measuring it properly?
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: vibration update on the cuda
[Re: moper]
#126954
09/29/08 05:45 PM
09/29/08 05:45 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
How are you sintalling teh u joints? Are you seating them against the clips after installing the clips? It's driveshaft. Definately. If you moved it up and fdowna couple degrees (pinion angle) what is is currently set at? You are positive you're measuring it properly?
im using a vise to put them in and pushing them up against the clips too. for a few yrs i was running at 5.7 down with no problem, then i moved it up a degree at a time to 2.7 and all still had the same results. im gonna order a brand new yoke just so i can eliminate that
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Re: vibration update on the cuda
[Re: moretoys]
#126955
09/29/08 06:19 PM
09/29/08 06:19 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
Stock trans mount/height??solid/poly mount??
Maybe the rear axle housing bent.any problems sliding the axles in/out??  axles go in great
Posible bent spring/making thrust angle off.rear wheels pointing more 1 way then the other.(dog tracking) not sure
Do you buzz the engine to the same rpm in 1st and 2nd?? yes and no vibes
Switching to 3.23 gears made the vibration come at a higher mph,Then It has to be rpm related
A shot in the dark.the fan??? electric
A cracked flywheel will usually make some noises
tailshaft bushings ok?? new tailshaft,housing and bushing
Vibrations can travel.What if the vibration is up front of the shaft,but the rear u-joints go bad because there is no room to move/ more tightly held together.
Have you had it on jackstand,and whatched the driveshaft,should be pretty smooth,any osilation.
just thinking outloud.
, did that the other day, and everything spins so smooth that it doesn't look like its moving
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Re: vibration update on the cuda
[Re: cudadan]
#126956
09/29/08 06:31 PM
09/29/08 06:31 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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I say just give it up and I will come over with my trailer and get it out of your hair and you wont have the problem any more,,,,,,,whatta' ya' think???  J/K hope you sort it out, but i'm outta thought's.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: vibration update on the cuda
[Re: dartman366]
#126957
09/29/08 06:32 PM
09/29/08 06:32 PM
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Joined: Aug 2003
Posts: 2,617
Stratford nj
cudadan
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,617
Stratford nj
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Quote:
I say just give it up and I will come over with my trailer and get it out of your hair and you wont have the problem any more,,,,,,,whatta' ya' think???
pleeeeeease come and take it LOL hey and its a real 74 360 cuda too lol
J/K hope you sort it out, but i'm outta thought's.
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Re: vibration update on the cuda
[Re: cudadan]
#126958
09/29/08 06:48 PM
09/29/08 06:48 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I would think your next step would be to take the d-shaft out and put a slip yoke in the trans and mount something to to keep it from falling out. Spin it up to the known problem rpm/speed and see if its still there, that would emininate the d-shaft and rear end if its still there..... or it would say that its a d-shaft or rear end problem if it isnt there
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Post deleted by Defbob
[Re: boomer]
#126960
09/29/08 08:12 PM
09/29/08 08:12 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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